WO2011000853A1 - Verfahren und diagnosevorrichtung zur diagnose einer beheizbaren abgassonde einer brennkraftmaschine - Google Patents
Verfahren und diagnosevorrichtung zur diagnose einer beheizbaren abgassonde einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2011000853A1 WO2011000853A1 PCT/EP2010/059251 EP2010059251W WO2011000853A1 WO 2011000853 A1 WO2011000853 A1 WO 2011000853A1 EP 2010059251 W EP2010059251 W EP 2010059251W WO 2011000853 A1 WO2011000853 A1 WO 2011000853A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- current
- exhaust gas
- gas probe
- cell
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/4175—Calibrating or checking the analyser
Definitions
- the invention relates to a method for diagnosing a heatable exhaust gas probe of an internal combustion engine according to the preamble of claim 1 and to a diagnostic device according to the preamble of claim 15.
- the exhaust gas probes are usually connected to a control and / or regulating device of the internal combustion engine, so that the control and / or regulating device can acquire information about the composition of exhaust gases emerging from the combustion chambers of the internal combustion engine.
- a control and / or regulating device of the internal combustion engine so that the control and / or regulating device can acquire information about the composition of exhaust gases emerging from the combustion chambers of the internal combustion engine.
- an exhaust gas probe at least one lambda probe is usually provided in an internal combustion engine with which an oxygen concentration in the exhaust gas can be detected. This allows a conclusion to an air
- the lambda sensors can be in so-called jump probes and
- the broadband probes can in turn be designed as single-cell broadband probes or as two-cell broadband probes.
- Modern internal combustion engines usually have one or two
- Lambda sensors which are used for gasoline engine jump and / or broadband probes. Diesel internal combustion engines have predominantly broadband lambda probes.
- control and / or regulating unit detects sensor signals generated by the lambda probe or the lambda probes and further sensors of the internal combustion engine and operates the internal combustion engine as a function of these sensor signals. To detect errors in the sensors, the control and / or
- the individual sensor signals are usually checked as to whether electrical faults (for example short circuits or interruptions of lines) are present. For this purpose, it can be checked, for example, whether the sensor signals are within admissible value ranges.
- electrical faults for example short circuits or interruptions of lines
- it can be checked, for example, whether the sensor signals are within admissible value ranges.
- Control device usually, whether system errors exist. A system error is detected, for example, if the variables detected by means of different sensors contradict each other. Recognizes the tax and / or
- Control device an electrical fault and / or a system error, then it notes the occurrence of the error in a fault memory.
- diagnosis of a single lambda probe is not possible. Becomes For example, detected an electrical fault, then can not be determined with certainty, if the fault is based on a defect of the lambda probe or if the control and / or regulating device, in particular an evaluation circuit for the sensor signals of the lambda probe, is defective.
- Single-cell and dual-cell broadband lambda probes are known, for example, from DE 10 2006 014 266 A1. Furthermore, from DE 197 16 173 A1 discloses a leakage current between an electrode of the lambda probe and a
- the present invention has for its object to provide a method for diagnosing an exhaust gas probe of an internal combustion engine, which allows a reliable and accurate diagnosis of the exhaust probe and allows a statement about the nature of any existing error on the exhaust probe.
- the task consists of specifying one to implement the procedure
- the exhaust gas probe is preferably a lambda probe, in particular a jumping probe, a single-cell wideband probe or a two-cell wideband probe.
- various parameters of the Exhaust probe largely independent of other components of the
- the exhaust gas probe is brought to a defined operating point, so that the diagnosis delivers results with high validity and reproducibility.
- the method is preferably carried out with the internal combustion engine stationary and not in operation. In this case, the exhaust gas probe can remain installed in the internal combustion engine.
- the method according to the invention can also be at one of the
- Internal combustion engine exhaust gas probe can be performed.
- the voltage to the with electrodes of a cell in particular a pump cell (in the case of a two-cell probe) or a combined pumping and measuring cell (in the case of a single-cell probe), the
- the voltage is varied step by step in alternating direction such that the voltage is successively different
- the voltage is applied to the terminals connected to a trim resistor of the exhaust probe. As a result, it can be checked on the one hand, whether the trim resistance within the exhaust probe
- a shunt is an unwanted electrically conductive path that runs parallel to a desired main electrically conductive path. If the current is within the permissible range, then the value of the trim resistor can be determined from the current. In this case, preferably as a function of a value of
- Trim resistance, a setpoint for the pumping current z. B. be determined in air, as a positive voltage pump voltage are applied and the
- a quotient between the pumping current and the desired value is preferably determined. If the quotient is greater in amount than one
- predetermined threshold for example, a crack in one
- a negative pump voltage is applied as the voltage, that an inverted pump current is detected as current, and it is checked whether the current is within a predefined permissible value
- an inner electrode of a pump cell, and an electrically conductive housing part of the exhaust gas probe are applied as a current
- Housing current can be detected and checked whether the housing current is less than or equal to a predetermined maximum value. If the current exceeds the maximum value, then the method determines that soot or other, in particular metallic deposits between the probe element and the
- Housing in particular a protective tube of the housing, have deposited.
- the above-described exhaust gas probe tests often involve a comparison of the detected current or a variable formed as a function of the detected current with predetermined threshold values or predetermined permissible ranges. Because different types of Exhaust gas sensors are used, the threshold values or the permissible ranges must be specified depending on the type of exhaust gas probe. Furthermore, often the regulation of the operating temperature must be adapted to the type of exhaust gas probe. For this purpose, the type of exhaust gas probe can be determined as a function of manual inputs by a user.
- Cell resistance of at least one cell of the exhaust gas probe preferably the cell resistance of a measuring cell of the exhaust gas probe is characterized, detected or determined and depending on the measured variable, a type of exhaust gas probe is determined. It has been recognized that the individual types of the exhaust gas probe differ in particular in their cell resistance, so that an assignment of the type to cell resistance is possible. By automatically determining the type of exhaust probe operating errors are largely avoided by the user.
- the cell resistance it can be provided that at least one measuring voltage is applied to the cell as the voltage and the current through the cell is detected as measured quantities for each measuring voltage.
- the type of exhaust gas probe can be determined more reliably, since the resistance is determined not only for one voltage, but for several voltages.
- At least two measuring voltages of different polarity are applied to the cell in chronological succession.
- this can in the first case, a statement about the ohmic
- Comparison of the type of exhaust gas probe determined. That is, for each measure is a result of the comparison is determined and the comparison results logically linked together to determine the type of exhaust gas probe.
- An exhaust pipe of a conventional internal combustion engine, in which the exhaust gas probe is installed, is usually sealed so well against the ambient air, that after switching off the engine oxygen-poor exhaust gas in the
- the diagnostic device may be used to carry out the invention
- Diagnostic device having a programmable computer, which is programmed to carry out the method according to the invention.
- FIG. 1 shows a to a two-chamber broadband lambda probe
- Figure 2 is a view similar to Figure 1, wherein it is in the
- FIGS. 3 to 7 each show a part of a flow chart as an exemplary embodiment of a method for the diagnosis of the lambda probe shown in FIGS. 1 and 2;
- FIG. 8 shows a detailed representation of a step of the method from FIGS. 3 to 7.
- the schematic representation of FIG. 1 shows a two-cell broadband
- Lambda probe 1 which has an electrical connection in the form of a
- the lambda probe 1 1 belongs to an exhaust system of an internal combustion engine (not shown). It can be arranged, for example, in the flow direction in front of or behind an exhaust gas catalytic converter in an exhaust pipe of the exhaust gas system.
- lambda probe 1 1 can also be temporarily removed from the internal combustion engine for the purpose of diagnosis. It is also conceivable that the
- the first functional test can also be carried out with the lambda probe 1 1 already installed.
- the lambda probe 1 1 has a pumping cell 17.
- the pumping cell 17 comprises an external pumping electrode 19, which is connected to a connection of the connector 13 designated "APE.”
- the pumping cell 17 is connected to a terminal IPN of the connector 13. Between the Outside pumping electrode 19 and the inner pumping electrode 21 is a first formed of zirconia solid electrolyte 23.
- a first formed of zirconia solid electrolyte 23 In the exhaust system built-Lambdasonde 1 1 is limited by the outer pumping electrode 19 side of the pumping cell 17 faces an interior of the exhaust pipe of the internal combustion engine, whereas a limited by the inner pumping electrode side the pumping cell 17 facing a in the interior of the lambda probe 1 1 existing diffusion gap (not shown).
- the pumping cell 17 is thus located between a side of the lambda probe 11 facing the interior of the exhaust pipe and the diffusion gap of the lambda probe 11.
- a measuring cell is arranged between the diffusion gap and a reference air channel (not shown) of the lambda probe 1 1, which is usually connected to ambient air.
- the Nernst cell 25 has a second solid electrolyte 27, on whose diffusion gap side facing a Nernst electrode 29 is arranged, which is electrically connected to the terminal IPN of the connector 13.
- a second solid electrolyte 27 is arranged at one of the reference air duct side facing the second
- Solid electrolyte 27 a reference electrode 31 of the Nernst cell 25 is arranged.
- the reference electrode 31 is electrically connected to a terminal RE of the connector 13.
- the lambda probe 1 1 a is arranged.
- Heating element 33 which is connected to two terminals H + and H- of the connector 13.
- the heating element 33 and the two cells 17 and 25 are integrated into a sensor element of the lambda probe 1 1, so that the heating element 33 is thermally coupled to the cells 17, 25, in particular to their solid-state electrolytes 23, 27.
- the lambda probe 1 1 is constructed according to a suitable manufacturing technology.
- the lambda probe 1 1 may be formed as a so-called finger probe or manufactured in a planar technology. Regardless of the manufacturing technology used, the
- Lambda probe 1 1 a housing 35, which is an electrically conductive
- Housing part 37 which may for example consist of metal.
- the electrically conductive housing part 37 is connected to the diagnostic device 15.
- a trim resistor 39 is arranged in the lambda probe 1 1, wherein a first terminal of the trim resistor 39 is connected to the terminal APE of the connector 13 and a second terminal of the trim resistor 39 is connected to the terminal RT of the connector 13.
- the trim resistor 39 may, for example, have a value of about 30 ohms to 300 ohms.
- the value of the trim resistor 39 is usually set immediately after the lambda probe is manufactured.
- the trim resistor 39 is connected in parallel to a measuring resistor in the control electronics. Then the trim resistor is adjusted so that a given current (eg 2.54 mA) results from the measuring resistor when the lambda probe 1 1 a
- the diagnostic device 15 has a first voltage source 41, which is supplied by a
- Control device 43 of the diagnostic device 15 is controlled on.
- the first voltage source 41 is connected in series with a first current sensor 45.
- the first current sensor 45 is connected to the control device 43, so that the control device 43 can detect a current I 1 flowing through the first voltage source 41.
- a terminal of the first current sensor 45 remote from the voltage source 41 is connected to the terminal APE of the connector 13.
- a side of the first voltage source 41 facing away from the first current sensor 45 is connected to a terminal of a first switching element 47 and of a second switching element 49. Another terminal of the first switching element 47 is connected to the terminal RT of the connector 13.
- Another connection of the second switching element 49 is connected to the connection IPN of the connector 13.
- the diagnostic device 15 has a second voltage source 51, which is connected in series with a second current sensor 53.
- the second voltage source 51 which is connected in series with a second current sensor 53.
- Voltage source 51 is controllable and in such a way to the control device 43 connected to this that can set a generated by the second voltage source 51 during operation voltage U 2 .
- the second current sensor 53 is coupled to the control device 43 such that the control device 43 can detect a current I 2 flowing through the second voltage source 51. A remote from the second voltage source 51 terminal of the second
- Current sensor 53 is connected to the terminal IPN of the connector 13.
- a terminal of the second voltage source 51 facing away from the second current sensor 53 is connected to a third switching element 55 and a fourth
- Switching element 57 connected.
- a terminal of the third switching element 55, which is not directly connected to the second voltage source 51, is connected to the housing part 37 of the lambda probe 1 1, and a terminal of the fourth switching element 57, which is not directly connected to the second voltage source 51, is with connected to the terminal RE of the connector 13.
- Each switching element 47, 49, 55, 57 is coupled to the control device 43, so that the control device 43, the individual switching elements 47,
- the switching elements 47, 49, 55, 57 can individually control (corresponding connections are not shown in FIG. 1 for the sake of clarity). Overall, the switching elements 47, 49, 55, 57 form a switching arrangement for connecting the voltage sources 41, 51 and the associated current sensors 45, 53 with the individual terminals APE, RT, IPN, RE of the connector 13 and with the
- the switching arrangement is constructed in a different way.
- the switching elements can at other terminals of the connector 13, for example, between a signal and a heater electrode for checking the internal
- Leakage current can be arranged. It can also be a different number
- Switching elements are provided. Moreover, it is conceivable to provide only one or more than two voltage sources instead of two voltage sources 41, 51 and to increase or reduce the number of switching elements accordingly.
- the switching elements 47, 49, 55, 57 can be realized in any desired manner (eg semiconductor switches or switching relays).
- the diagnostic device 15 has a control element 59 for regulating a temperature of the lambda probe 1 1 based on an internal resistance of the Nernst cell 25.
- the control element 59 is connected to the two terminals H + and H- of the connector 13, which is connected to the heating element 33 of the
- Lambda probe 1 1 are connected.
- the control element 59 is connected to the Control means 43 connected, so that the control means 43, the control element 59 can control, for example, to specify a desired value.
- the exhaust gas probe is designed as a single-cell broadband lambda probe 61. Instead of the pumping cell 17 and the Nernst cell
- single cell broadband lambda probe 61 includes a combined pumping and Nernst cell 63. Therefore, in this probe 61, only the first one
- Solid electrolyte 23 is present.
- An outer electrode 65 is arranged on a side of the first solid electrolyte 23 facing the interior of the exhaust pipe when the probe 61 is installed.
- an inner electrode 67 is arranged on an away from the interior side of the first solid electrolyte 23, an inner electrode 67 is arranged.
- the outer electrode 65 is electrically connected to a terminal ALE of the connector 13, and the inner electrode 67 is electrically connected to a terminal IPE of the connector 13.
- the single-diode broadband lambda probe 61 can be connected to the simplified diagnostic device 15 shown in FIG. In the case of the diagnostic device 15 shown in FIG. 2, the third switching element 55 and the fourth switching element 57 shown in FIG. 1 are not present. It is also possible to use the diagnostic device 15 shown in FIG. 1 in conjunction with the single-cell broadband lambda probe 61.
- the terminal RT of the diagnostic device 15 can remain free, and the combined pumping and Nernst cell 63 is connected with its connection ALE to the connection APE of the diagnosis device 15 and with its connection IPE to the connections IPN and RE of the diagnosis device 15 ,
- the single-cell broadband lambda probe 61 also has the trim resistor 39. This can for example be between the terminal ALE and the one shown in FIG
- This method 71 can be carried out by means of the diagnostic device shown in FIGS. 1 and 2 under the control of its control device 43. Deviating from this, the method 71 can also be implemented in other ways, in particular with differently constructed diagnostic devices and / or other, e.g. dynamic, such as sinusoidal, voltage-time programs or current-time programs, are performed.
- the lambda probe 1 1 When using the diagnostic device 15, the lambda probe 1 1 must be electrically disconnected from the control and / or regulating device of the internal combustion engine and connected to the diagnostic device 15. This can be done, for example, by performing before executing the
- Lambda probe 1 1 and the diagnostic device 15 is made manually.
- the method 71 is executed, for example, when the internal combustion engine is stationary or at a stable operating point.
- the lambda probe 1 1 can remain installed in the internal combustion engine. However, it is also possible to expand the lambda probe 1 1 before carrying out the method 71 from the internal combustion engine. Since neither the diagnostic device 15 nor the lambda probe 1 1 with the control unit of the internal combustion engine in the
- Execution of the method 71 is connected, by means of the method 71 an isolated diagnosis of the lambda probe 1 1 can be performed.
- a type of lambda probe 1 1 is determined in a probe detection step 75.
- Probe detection 75 determines the type of probe by electrical measurements, so that the subsequent steps of the method 71 can be carried out in dependence on the determined type of lambda probe 1 1.
- control device 43 adjusts the control element 59 in such a way that it regulates a temperature of the sensor element of the lambda probe to a predetermined desired value.
- a controlled variable here is one of the
- a manipulated variable is a heating power of the heating element 33, which may influence the control element 59, for example by changing the heating voltage U H.
- the control device 43 determines from the predetermined setpoint value of the temperature and a type of lambda probe identified by step 75 a setpoint value for the
- the desired value of the temperature of the sensor element can be specified either as a constant, or the desired value of the temperature can be specified depending on the type of lambda probe. It can also be provided that the
- Control device 43 the target value of the internal resistance directly in
- the control device 43 controls the first switching element 47 and the second switching element 49 so that only the first switching element 47 is closed.
- control device controls the first voltage source 41 such that a predetermined voltage URT is applied to the voltage source 41 and thus also between the terminals APE and RT.
- the control device 43 detects the current I 1 by means of the first current sensor 45, which corresponds to a current through the trim resistor 39 when the lambda probe 1 1 is intact.
- it is checked in a branch 79, whether the current I RT within a by a minimum value Im-. m i n and a maximum Im-. max limited Area lies. If this is not the case (N), an error is detected in a step 81.
- the control device 43 can determine the error in step 81 and / or log. If the current is smaller than the minimum value l RT, max , then a poor contact of the trim resistor 39 or a
- step 81 Interruption detected between a terminal of the trim resistor 39 and one of the terminals APE or RT of the connector 13. If the detected current I RT is greater than the maximum value I RT, max , then a shunt parallel to the trim resistor 39 is detected. If the detected current is within the allowable range (Y), then branching is made to a next test step 83. Notwithstanding the embodiment shown, depending on the predetermined voltage U RT and the detected current I RT , the resistance between the terminals APE and RT can first be calculated and the calculated resistance compared with a permissible resistance range. Depending on this comparison, it is then possible in step 81 again to indicate a bad contact or interruption or a
- step 83 of the voltage source 41 is a constant
- the value of the pumping voltage U P is varied stepwise. Initially, no or only a low voltage is applied to the pump cell 17 or the pumping and Nernst cell 63, after which a relatively small value U P 1 , which can be, for example, 800 mV, is applied and an associated current I P 1 is applied of the first current sensor 45 is measured. Subsequently, a higher voltage U P 1 , which can be, for example, 800 mV, is applied and an associated current I P 1 is applied of the first current sensor 45 is measured. Subsequently, a higher
- Terminals APE and IPN or ALE and IPE applied and an associated current I P 2 measured.
- the smaller pumping voltage U P 1 is again applied and an associated current I P 3 is detected.
- a branch 85 checks whether the two current values I P 1 and Ip 2 are zero. If this is the case (Y), in a step 87, a defect of
- Absolute values as well as the difference between them can be used as a diagnostic criterion. This improves the sensitivity to defective IPN and, in combination with the results of the Ip hysteresis study, allows a clear distinction as to which of the two pumping electrodes is the defective one.
- Switching elements 47 and 49 applied and the current I 1 detected as a current I RT2 . From the detected current I RT2 , a desired value IP , SO is determined for the pumping current (step 95). Subsequently, in a step 97, a predetermined constant positive pump voltage U P > 0 is applied to the terminals APE and IPN. For this purpose, the control device 43 controls the switching elements 47, 49 and the first
- a branching 99 it is checked in a branching 99 whether a quotient of the detected pumping current I P and the determined desired value I P, SO ⁇ is in terms of magnitude in a range bounded by the values Q m ⁇ n and Q max . This is not the case (N), then in a step 101, an error in the pumping cell 17 is detected. If the quotient is greater than the value Q max , then a crack in one
- Probe to be set during diagnosis present gas.
- the quotient may deviate up to 14%, that is
- steps 93, 95, 97, 99, 101 shown in FIG. 5 for checking the hysteresis are also carried out in single-cell probes and / or probes without the trim resistor 39.
- the pump voltage U P is applied to the terminals ALE and IPE in step 97. at
- step 93 and in step 95, the setpoint I P, SO ⁇ the pumping current in other ways, for example, as a constant, which may depend on the type of lambda probe set.
- a negative voltage -U Pn is generated by the first voltage source 41, that is, Ui ⁇ 0.
- the negative voltage is applied to the terminals APE and IPN, and ALE and IPE, respectively.
- the control device 43 closes the first switching element 47 and opens the second switching element 49.
- a pump current I P is detected.
- a branch 105 following the step 103 checks whether the magnitude of the detected pumping current I P is within a range determined by values I P m ⁇ n and I P, max limited area lies.
- step 107 If this is not the case (N), then a fault is detected in the lambda probe 1 1 in a step 107. Otherwise (Y), a branch is made to a step 109. If the detected pumping current I P is less than the minimum value Ip m i n , then in step 107 a sooting of one on the
- shedding can occur due to deposits between the
- step 109 a Conductivity between the port IPN or IPE and the conductive housing part 37 checked. For this purpose, in step 109 a
- Voltage U ge between the port IPN or IPE and the electrically conductive housing part 37 is applied.
- the voltage U is ge
- control device 43 of the diagnostic device shown in Figure 1 closes the third switching element 55 and holds the fourth switching element 57 open. Further, the controller 43 controls the second one
- a shunt may be due to fouling of the lambda probe 1 1, in particular of a
- Soot deposit between the sensor element and an inner side of a protective tube of the housing 35 originate. If the housing current l ge is not greater than the critical value l ge , knt (N), then it is branched to a step 1 15. in the
- Step 1 15 will be the test results obtained in the previous steps evaluated. For example, they can be displayed and / or saved. It is also conceivable that, in particular if all tests have individually delivered no error finding, a multi-dimensional feature spectrum is checked. That is, the tolerance ranges of each function variable examined are fixed in a final test of where each of the other functional values lie. This allows for a more sensitive overall diagnosis and also takes into account interactions between individual parameters. Subsequently, the process in step 1 17 is terminated. In the illustrated embodiment of the method 71, in the case where a single check recognizes an error, that is, in case one of the steps 81, 87, 91, 101, 107 or 1 13 is executed, the method 71 is referred to the next review. That is, everyone will
- control device 43 controls the sequence of the method 71 and evaluates detected variables for the diagnosis of the lambda probe 1 1, 61 from.
- the control device 43 thus also forms an evaluation unit of the diagnostic device 15. Deviating from this, however, it can also be provided that the method
- step 71 is terminated as soon as one of the checks detects an error.
- step 81, 87, 91, 101 or 107 immediately branches to step 1 15.
- the order of the checks shown in each case in Figures 3 to 7 can be varied as desired. In other words,
- Embodiments may also account for any of these reviews.
- step 75 for recognizing the type of lambda probe 1 1 will be explained in more detail below with reference to FIG.
- the control device 43 first controls the control element 59 in such a way that a heating voltage U H is applied between the connection H + and the connection H of the lambda probe 1 1 (step
- the heating voltage UH only has to be sufficiently high so that a sufficiently high temperature of the solid-state electrolytes 23, 27 is achieved for all types of probes with which the diagnostic device 15 is to be operated
- Solid electrolytes 23, 27 can conduct oxygen ions.
- oxygen ions are transported to the diffusion gap of the lambda probe 1 1.
- a negative voltage U 0 ⁇ 0 is applied to the Nernst cell 25.
- the Nernst cell 25 is again disconnected from the voltage U 0 .
- the control device 43, the fourth switching element 57 open.
- a step 125 following the step 123 by means of the
- Voltage sensor 52 a voltage U M between the terminal APE and the terminal RE, that is, substantially a voltage between the outer pumping electrode 19 and the reference electrode 31 detected.
- the magnitude of the voltage UM is a measure of the oxygen content in the gas, which is present at the side of the lambda probe 1 1 facing the outer pumping electrode 19.
- the result is a relatively high value for the voltage U M , which is typically above 450 mV.
- the steps 123 and 125 thus serve to detect low-oxygen gas (fat gas detection).
- Low-oxygen gas may be present in particular when the lambda probe 1 1 during the diagnosis in the exhaust pipe of the
- step 123 the voltage UD is applied to the terminals ALE and IPE.
- step 125 the voltage U M by means of the voltage sensor 52 between the
- connections ALE and IPE measured. Subsequently, it is checked in a branch 127 whether the detected voltage UM is greater in magnitude than a critical value U M, k ⁇ t - If this is the case (Y), then it is recognized that oxygen-poor, that is rich gas is present, and in one step 129, a correction value ⁇ U is set to a value corresponding to the magnitude of the voltage U M. Otherwise (N), in step 131, the
- Step 129 or 131 is followed by a step 133 in which a negative voltage is applied between the terminal IPN and the terminal RE. This voltage corresponds to a predetermined amount
- a positive predetermined constant voltage U S D2> 0 is applied to the terminals IPN and RE, whereby the voltage at the
- step 137 the type of lambda probe 1 1 is determined as a function of the two detected pump currents I S DI and I SD2 .
- two types of lambda probe 1 1 can be distinguished on the basis of the detected pump currents I S DI and ISD 2
- Geometry in particular the size of the air diffusion channel for
- Electrode 29 differ. Because of the different geometries namely a resistance of the Nernst cell 25 of the lambda probe 1 1 of these different types is different. This results in the lambda probe 1 1 of the type in which the Nernst cell 25 a small ohmic
- step 137 the type of lambda probe 1 1 is detected, in which the resistance of the Nernst cell 25 and the reference air channel is low, when the detected Currents are both greater than certain predetermined minimum values, that is, if I S DI> Xi and ISD2> as X2.
- step 137 the type of lambda probe 11, in which the resistance of the Nernst cell 25 and the reference air channel is high, is detected when the detected currents are less than certain predetermined minimum values, that is, if I S DI ⁇ as Yi and I S D2 ⁇ as Y 2 .
- Other, opposite combinations between the detected currents may also characterize a probe type.
- the above-described steps 133, 135, 137 for distinguishing types of the lambda probe 1 1 can be applied in a corresponding manner also in conjunction with the single-cell lambda probe 61.
- the method 71 can either be canceled or a user of the diagnostic device 15 for manually entering the type of lambda probe
- step 137 a non-unique
- Abrasion or aging effects (so-called dynamic effects) of the lambda probe 1 1 has changed.
- the present invention provides a method or a diagnostic device, with a detailed review of a
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Computer Hardware Design (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10726131A EP2449237A1 (de) | 2009-07-01 | 2010-06-30 | Verfahren und diagnosevorrichtung zur diagnose einer beheizbaren abgassonde einer brennkraftmaschine |
JP2012518081A JP5620483B2 (ja) | 2009-07-01 | 2010-06-30 | 内燃機関の加熱可能な排気センサを診断する方法及び診断装置 |
CN201080029983.1A CN102472185B (zh) | 2009-07-01 | 2010-06-30 | 用于对内燃机的能够加热的废气探测仪进行诊断的方法和诊断装置 |
US13/381,437 US9062623B2 (en) | 2009-07-01 | 2010-06-30 | Method and diagnostic device for diagnosing a heatable exhaust gas sensor of an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910027378 DE102009027378A1 (de) | 2009-07-01 | 2009-07-01 | Verfahren und Diagnosevorrichtung zur Diagnose einer beheizbaren Abgassonde einer Brennkraftmaschine |
DE102009027378.6 | 2009-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011000853A1 true WO2011000853A1 (de) | 2011-01-06 |
Family
ID=42676641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/059251 WO2011000853A1 (de) | 2009-07-01 | 2010-06-30 | Verfahren und diagnosevorrichtung zur diagnose einer beheizbaren abgassonde einer brennkraftmaschine |
Country Status (7)
Country | Link |
---|---|
US (1) | US9062623B2 (de) |
EP (1) | EP2449237A1 (de) |
JP (1) | JP5620483B2 (de) |
KR (1) | KR20120102497A (de) |
CN (1) | CN102472185B (de) |
DE (1) | DE102009027378A1 (de) |
WO (1) | WO2011000853A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011154228A1 (de) * | 2010-06-08 | 2011-12-15 | Robert Bosch Gmbh | Verfahren zum erkennen des typs von lambdasonden |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8438899B2 (en) * | 2009-09-02 | 2013-05-14 | Ford Global Technologies, Llc | Method for evaluating degradation of a particulate matter sensor |
DE102009050221A1 (de) * | 2009-10-22 | 2011-05-05 | Continental Automotive Gmbh | Vorrichtung und Verfahren zur Diagnose eines Abgassensors |
DE102009047648B4 (de) * | 2009-12-08 | 2022-03-03 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Diagnose von Abweichungen bei einer Einzelzylinder-Lambdaregelung |
DE102010045684B4 (de) * | 2010-09-16 | 2013-10-31 | Mtu Friedrichshafen Gmbh | Verfahren zur Lambdaregelung einer Brennkraftmaschine |
DE102010055478A1 (de) * | 2010-12-22 | 2012-06-28 | Continental Automotive Gmbh | Verfahren zum Betreiben eines Rußsensors |
DE102011007447A1 (de) * | 2011-04-15 | 2012-10-18 | Robert Bosch Gmbh | Verfahren zum Betrieb mindestens eines Sensorelements |
DE102011084734A1 (de) * | 2011-10-18 | 2013-04-18 | Robert Bosch Gmbh | Verfahren zum Abgleichen eines Gassensors |
DE102012203401A1 (de) * | 2012-03-05 | 2013-09-05 | Volkswagen Aktiengesellschaft | Verfahren zur Steuerung einer Heizeinrichtung zur Beheizung eines Bauteils, Steuervorrichtung sowie Kraftfahrzeug mit einer solchen |
DE102013223049A1 (de) | 2013-11-13 | 2015-05-13 | Robert Bosch Gmbh | Verfahren zur Diagnose einer Lambda-Sonde im laufenden Betrieb |
DE102013223731A1 (de) * | 2013-11-20 | 2015-05-21 | Robert Bosch Gmbh | Verfahren und Betrieb einer Sensorauswerteeinheit und Sensorauswerteeinheit |
DE102014200063A1 (de) * | 2014-01-07 | 2015-07-09 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Überwachung der Fettgas-Messfähigkeit einer Abgas-Sonde |
DE102014220398A1 (de) * | 2014-10-08 | 2016-04-14 | Robert Bosch Gmbh | Verfahren zur Funktionskontrolle eines Sensors zur Detektion von Teilchen |
US10078033B2 (en) * | 2016-01-20 | 2018-09-18 | Ford Global Technologies, Llc | Oxygen sensor element blackening detection |
JP6546549B2 (ja) * | 2016-03-09 | 2019-07-17 | 日本碍子株式会社 | ガスセンサの検査方法およびガスセンサの製造方法 |
DE102016207516B4 (de) * | 2016-05-02 | 2021-10-28 | Vitesco Technologies GmbH | Verfahren zur Alterungsbestimmung einer zur Ermittlung einer Gaskonzentration eines Gasgemischs ausgebildeten Sonde einer Brennkraftmaschine |
US10371736B2 (en) | 2017-02-28 | 2019-08-06 | Delphi Technologies Ip Limited | Short-circuit pinpointing device |
DE102017211220A1 (de) * | 2017-05-24 | 2018-11-29 | Robert Bosch Gmbh | Verfahren zur Diagnose einer Brennkraftmaschine eines Kraftfahrzeuges, sowie der mit der Brennkraftmaschine verbundenen Vorrichtungen, sowie ein System zur Durchführung des Verfahrens |
US11957113B2 (en) | 2017-11-13 | 2024-04-16 | Beewise Technologies Ltd | Automatic beehives |
DE102018207793A1 (de) * | 2017-12-19 | 2019-06-19 | Robert Bosch Gmbh | Verfahren zur Erfassung von Partikeln eines Messgases in einem Messgasraum und Sensoranordnung zur Erfassung von Partikeln eines Messgases in einem Messgasraum |
DE102018215887A1 (de) * | 2018-09-19 | 2020-03-19 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Diagnostizieren eines Abgassensors |
DE102019204827A1 (de) * | 2019-04-04 | 2020-10-08 | Robert Bosch Gmbh | Verfahren zur Diagnose von Abgassensoren |
JP7286518B2 (ja) * | 2019-11-25 | 2023-06-05 | 日本碍子株式会社 | ガスセンサ及びクラック検出方法 |
JP7312095B2 (ja) * | 2019-11-25 | 2023-07-20 | 日本碍子株式会社 | ガスセンサ及びクラック検出方法 |
DE102019219647A1 (de) * | 2019-12-16 | 2021-06-17 | Robert Bosch Gmbh | Messung des Nebenschlusswiderstands einer Lambdasonde und Korrektur dessen Einflusses |
FR3111950B1 (fr) * | 2020-06-29 | 2022-06-17 | Vitesco Technologies | Contrôleur moteur adapté pour identifier une sonde de richesse inadaptée et procédé associé |
US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3115404A1 (de) * | 1981-04-16 | 1982-11-11 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren und vorrichtung zur ueberwachung und kalibrierung von grenzstromsonden |
DE19622625A1 (de) * | 1995-06-05 | 1996-12-12 | Nippon Denso Co | Vorrichtung und Verfahren zum Diagnostizieren einer Verschlechterung oder einer Funktionsstörung eines Sauerstoffsensors |
DE19845927A1 (de) * | 1998-10-06 | 2000-04-13 | Bosch Gmbh Robert | Verfahren zum Prüfen eines Meßfühlers |
EP1480039A1 (de) * | 2003-05-09 | 2004-11-24 | Denso Corporation | Anordnung zur Fehlererkennung verschiedener Fehlertypen von Festelektrolyt-Gassensoren |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5965249A (ja) * | 1982-10-06 | 1984-04-13 | Hitachi Ltd | 酸素濃度検出器 |
JP2744088B2 (ja) * | 1989-10-13 | 1998-04-28 | 日本特殊陶業株式会社 | 空燃比センサ |
DE4340875A1 (de) * | 1993-12-01 | 1995-06-08 | Bosch Gmbh Robert | Sauerstoffmeßfühler |
JP3500775B2 (ja) * | 1995-06-13 | 2004-02-23 | 株式会社デンソー | 酸素センサの劣化判定装置 |
JP3562030B2 (ja) * | 1995-06-05 | 2004-09-08 | 株式会社デンソー | 酸素センサの異常診断装置 |
DE19716173C2 (de) | 1997-04-18 | 2000-05-04 | Bosch Gmbh Robert | Prüfung des Leckstroms bei planaren Lambdasonden |
JPH11153569A (ja) * | 1997-11-21 | 1999-06-08 | Osaka Gas Co Ltd | 酸素センサの劣化診断装置及びその方法 |
DE10257284A1 (de) * | 2002-12-07 | 2004-06-24 | Robert Bosch Gmbh | Schaltungsanordnung zum Betreiben eines Gassensors |
DK1494025T3 (da) * | 2003-07-03 | 2007-09-17 | Sulzer Hexis Ag | Test af en lambdasondes funktionsegnethed |
CN100501138C (zh) * | 2003-07-07 | 2009-06-17 | 北京科技大学 | 一种电流型汽车尾气传感器的制造方法 |
JP4605783B2 (ja) * | 2004-11-30 | 2011-01-05 | 日本特殊陶業株式会社 | ガスセンサ及びガスセンサの製造方法 |
DE102006014266A1 (de) | 2005-12-23 | 2007-06-28 | Robert Bosch Gmbh | Breitband-Lambdasonde |
JP2009031153A (ja) * | 2007-07-27 | 2009-02-12 | Toyota Motor Corp | 酸素センサの制御装置 |
JP4863960B2 (ja) * | 2007-10-12 | 2012-01-25 | 日立オートモティブシステムズ株式会社 | 酸素センサの検査方法 |
-
2009
- 2009-07-01 DE DE200910027378 patent/DE102009027378A1/de not_active Withdrawn
-
2010
- 2010-06-30 WO PCT/EP2010/059251 patent/WO2011000853A1/de active Application Filing
- 2010-06-30 CN CN201080029983.1A patent/CN102472185B/zh not_active Expired - Fee Related
- 2010-06-30 JP JP2012518081A patent/JP5620483B2/ja not_active Expired - Fee Related
- 2010-06-30 US US13/381,437 patent/US9062623B2/en not_active Expired - Fee Related
- 2010-06-30 KR KR1020117031604A patent/KR20120102497A/ko active IP Right Grant
- 2010-06-30 EP EP10726131A patent/EP2449237A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3115404A1 (de) * | 1981-04-16 | 1982-11-11 | Robert Bosch Gmbh, 7000 Stuttgart | Verfahren und vorrichtung zur ueberwachung und kalibrierung von grenzstromsonden |
DE19622625A1 (de) * | 1995-06-05 | 1996-12-12 | Nippon Denso Co | Vorrichtung und Verfahren zum Diagnostizieren einer Verschlechterung oder einer Funktionsstörung eines Sauerstoffsensors |
DE19845927A1 (de) * | 1998-10-06 | 2000-04-13 | Bosch Gmbh Robert | Verfahren zum Prüfen eines Meßfühlers |
EP1480039A1 (de) * | 2003-05-09 | 2004-11-24 | Denso Corporation | Anordnung zur Fehlererkennung verschiedener Fehlertypen von Festelektrolyt-Gassensoren |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011154228A1 (de) * | 2010-06-08 | 2011-12-15 | Robert Bosch Gmbh | Verfahren zum erkennen des typs von lambdasonden |
JP2013528288A (ja) * | 2010-06-08 | 2013-07-08 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | ラムダセンサのタイプを検出する方法 |
US9347903B2 (en) | 2010-06-08 | 2016-05-24 | Robert Bosch Gmbh | Method for detecting the type of lambda probes |
Also Published As
Publication number | Publication date |
---|---|
CN102472185B (zh) | 2016-01-06 |
CN102472185A (zh) | 2012-05-23 |
KR20120102497A (ko) | 2012-09-18 |
US9062623B2 (en) | 2015-06-23 |
US20120167656A1 (en) | 2012-07-05 |
EP2449237A1 (de) | 2012-05-09 |
DE102009027378A1 (de) | 2011-01-05 |
JP2012531603A (ja) | 2012-12-10 |
JP5620483B2 (ja) | 2014-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2011000853A1 (de) | Verfahren und diagnosevorrichtung zur diagnose einer beheizbaren abgassonde einer brennkraftmaschine | |
DE102012202847B4 (de) | Verfahren zur Diagnose der elektrischen Kontaktierung eines Abgassensors | |
DE102009050221A1 (de) | Vorrichtung und Verfahren zur Diagnose eines Abgassensors | |
DE102016206991A1 (de) | Verfahren zur Diagnose eines Stickoxidsensors in einer Brennkraftmaschine | |
DE102014200063A1 (de) | Verfahren und Vorrichtung zur Überwachung der Fettgas-Messfähigkeit einer Abgas-Sonde | |
DE102007034251A1 (de) | Fehleranalyseverfahren für eine Lambda-Sonde | |
EP3596453B1 (de) | Sensor und verfahren zum betreiben eines sensors zur erfassung mindestens einer eigenschaft eines messgases in einem messgasraum | |
EP2912447B1 (de) | Verfahren und vorrichtung zur diagnose des luftreferenzkanals einer breitband-lambdasonde | |
WO2012139797A1 (de) | Verfahren zum betrieb eines gassensorelements und vorrichtung zur durchführung des verfahrens | |
DE102011004073A1 (de) | Verfahren und Vorrichtung zur Diagnose der elektrischen Kontaktierung eines Abgassensors | |
DE102020204213A1 (de) | Verfahren zum Ermitteln eines Zustandsparameters eines Abgassensors | |
DE102013202260A1 (de) | Verfahren und Vorrichtung zur Überwachung eines mehrzelligen Abgassensors | |
DE102014224943A1 (de) | Verfahren zur Erkennung von mindestens zwei Arten von elektrischen Fehlern in mindestens einem Stromkreis | |
DE102011084734A1 (de) | Verfahren zum Abgleichen eines Gassensors | |
WO2014139764A1 (de) | Sensorvorrichtung und verfahren zum erfassen eines gases in einem gasgemisch | |
EP1084399B1 (de) | Verfahren zur bestimmung der nox-konzentration | |
DE102020210925A1 (de) | Verfahren zur Leitungszuordnung eines Kurzschlusses einer Breitband-Lambdasonde | |
DE102010040817A1 (de) | Verfahren zum Abgleich eines Sensorelements zur Erfassung einer Gaseigenschaft | |
DE102008001223A1 (de) | Beheizte Sprungsonde mit vereinfachter elektrischer Kontaktierung | |
DE102008004359A1 (de) | Verfahren zum Betreiben eines Sensorelements zur Bestimmung der Konzentration von Gaskomponenten | |
DE102004048859A1 (de) | Verfahren und Vorrichtung zur Ansteuerung und Diagnose für die Beheizung einer Lambdasonde | |
DE10129344A1 (de) | Verfahren zur Einstellung der Ausgabecharakteristik eines Gassensorelements auf der Grundlage der Zufuhr elektrischer Energie an dieses Sensorelement | |
DE102011005882A1 (de) | Vorrichtung zur Bestimmung des Sauerstoffgehalts in einem Abgas und Verfahren zur Kennzeichnung und zum Betrieb einer Breitband-Lambdasonde | |
DE102009028327A1 (de) | Verfahren und Vorrichtung zur Bestimmung der Zusammensetzung eines Kraftstoffgemischs zum Betrieb einer Brennkraftmaschine | |
DE102012211685A1 (de) | Verfahren und Vorrichtung zur Bestimmung einer Luftzahl Lambda mit einem Gas-Sensor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080029983.1 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010726131 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10726131 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012518081 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 20117031604 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13381437 Country of ref document: US |